Local xpi stopped modules installation

I have hundreds of Firefox addons that I developed for my company to perform tasks automated in our information system. Firefox updated to 40.03 today and I can't is no longer an any of them install in Firefox.

"firefox prevented this site asking you to install the software on your computer.

Is there a setting in Firefox I can disable to allow me to install ad - donations that I've developed? I don't really want to sign these. They are not hosted in any case, but live on a local computer. They are all owners and we only use internally.

Tags: Firefox

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